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(p200300d82f07dd00ca9c199ed2b69099.dip0.t-ipconnect.de. [2003:d8:2f07:dd00:ca9c:199e:d2b6:9099]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4613e754140sm70721995e9.21.2025.09.18.02.03.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 18 Sep 2025 02:03:04 -0700 (PDT) Message-ID: <45cd1637-54f6-4941-9670-7130aaf080f0@redhat.com> Date: Thu, 18 Sep 2025 11:03:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V14 1/6] mm: softdirty: Add pgtable_supports_soft_dirty() To: Chunyan Zhang , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Deepak Gupta , Ved Shanbhogue , Alexander Viro , Christian Brauner , Jan Kara , Andrew Morton , Peter Xu , Arnd Bergmann , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Axel Rasmussen , Yuanchu Xie , Chunyan Zhang References: <20250918083731.1820327-1-zhangchunyan@iscas.ac.cn> <20250918083731.1820327-2-zhangchunyan@iscas.ac.cn> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20250918083731.1820327-2-zhangchunyan@iscas.ac.cn> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: Pspye9J77DSz3pt80JpmIE7xlLQ9V_Jr7zjHo_tBzZA_1758186186 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: dqop5xeih6yywwhfcn74ohfhyhpx9ypp X-Rspam-User: X-Rspamd-Queue-Id: 9C9B818000A X-Rspamd-Server: rspam04 X-HE-Tag: 1758186188-805736 X-HE-Meta: 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 jwPtvAY/ Dq388dQDZV1IaZcQHAhnZ9OieeN+jvSf0BeEO8oEYo82N1liJM/c/Z+25pZeoczM6vCfV++i1Z96wD1YakjdzGc2MADouaFh3ndJgwaqmO7BjuoNe+bxA/+a+6gOVYgfcb03iO1aAQc8nBUR+ag5O9Zm6MWn0yCw/bTeMBzmm4N7egoYfT0DukuiSp4wBTB6QWBRiOZAIH+zpitMMkwSnF+wp2m3czjUYa0lrxRLZJgQsmGUV2ci7U5HMfT4AQQUR2nW/rRw7DlGxbeYlK892+nmWNSaDyqu5M5Wi/CPxrtAfVqzdf6hjIG+5ooGV/Rles8ZmjVp2ZG67MyDyLoebTLv2mW/mdlSxURWxGiQMWMa2LcGISHSwuv0OQcQn8drbaTZTT1TWAX+Twc28wPdT63YxLcda3GnPTaqzZXcN/+aGJk8IY2dpaXAzeMfzVXfC22OUM6pvC+5ki6K7SIPE4twNiQRIZyFr7QdaZ+9FzZeZsZF+632Ofr5cNA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 18.09.25 10:37, Chunyan Zhang wrote: > Some platforms can customize the PTE PMD entry soft-dirty bit making it > unavailable even if the architecture provides the resource. > > Add an API which architectures can define their specific implementations > to detect if soft-dirty bit is available on which device the kernel is > running. > > This patch is removing "ifdef CONFIG_MEM_SOFT_DIRTY" in favor of > pgtable_supports_soft_dirty() checks that defaults to > IS_ENABLED(CONFIG_MEM_SOFT_DIRTY), if not overridden by > the architecture, no change in behavior is expected. > > We make sure to never set VM_SOFTDIRTY if !pgtable_supports_soft_dirty(), > so we will never run into VM_SOFTDIRTY checks. > > Acked-by: David Hildenbrand > Signed-off-by: Chunyan Zhang > --- [...] > mas_store_fail: > diff --git a/mm/vma_exec.c b/mm/vma_exec.c > index 922ee51747a6..a822fb73f4e2 100644 > --- a/mm/vma_exec.c > +++ b/mm/vma_exec.c > @@ -107,6 +107,7 @@ int relocate_vma_down(struct vm_area_struct *vma, unsigned long shift) > int create_init_stack_vma(struct mm_struct *mm, struct vm_area_struct **vmap, > unsigned long *top_mem_p) > { > + unsigned long flags = VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP; No need to resend because of this (probably can be fixed up when applying): there is a double space before the "=" -- Cheers David / dhildenb